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Pelican Technical Article:

Spark Plug Replacement

Jared Fenton

Time:

1 hour1 hr

Tab:

$20

Talent:

***

Tools:

Long needle-nose pliers, 5/8? spark plug socket w/swivel, torque wrench

Applicable Models:

Jetta MkIV 2.0L (1999-05)

Parts Required:

Spark plugs

Hot Tip:

Always change spark plugs when the engine is cold

Performance Gain:

Smoother running engine

Complementary Modification:

Change coil pack and wires

One basic tune-up procedure for just about any car on the road is the replacement of your spark plugs and spark plug wires (where applicable). I recommend examining and/or replacing your spark plugs every 10,000 miles, or about once a year. In reality, you can probably go longer than that but you never really quite know how long the plugs are going to last, or you may forget to do it if you don't setup a yearly schedule.

Begin by prepping the car. The only thing that you really need to do is to make sure that the car is cold. If you try to remove or install spark plugs in a hot car, then you may encounter problems with the spark plugs galling up or damaging the relatively delicate threads in the cylinder head. Make sure that the car is cold, or at the bare minimum, only slightly warm to the touch.

Also see our article on Spark Plug Coil Pack Replacement regarding replacement of the coil pack and spark plug wires. Additionally, the engine cover must be removed to access the spark plugs. See our article on Engine Cover Removal for more information.

This picture shows the location of the two spark plugs accessible to the right of the intake manifold (green arrows).
Figure 1

This picture shows the location of the two spark plugs accessible to the right of the intake manifold (green arrows).  

This picture shows the location of the two spark plugs accessible to the left of the intake manifold (green arrows).
Figure 2

This picture shows the location of the two spark plugs accessible to the left of the intake manifold (green arrows).

Shown here is one of the spark plug wire/insulators (green arrow) that connects to each spark plug.
Figure 3

Shown here is one of the spark plug wire/insulators (green arrow) that connects to each spark plug. VW recommends the use of a special tool to remove these. I found a pair of long needle-nose pliers works equally as well.

Shown here is one of the spark plugs with the wire/insulator removed (green arrow).
Figure 4

Shown here is one of the spark plugs with the wire/insulator removed (green arrow).

For all four cylinders - Use a 5/8 spark plug socket to remove the spark plug down below.
Figure 5

For all four cylinders - Use a 5/8" spark plug socket to remove the spark plug down below. It may not seem like it, but you can access all the plugs without removing the intake manifold.

When fitting the new spark plug, carefully thread it in by hand and torque it to 30Nm (22 ft/lbs.
Figure 6

When fitting the new spark plug, carefully thread it in by hand and torque it to 30Nm (22 ft/lbs.). Be sure that the wire/insulator clicks firmly on to each plug.


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Page last updated: Mon 12/5/2016 03:06:37 AM